mirror of https://github.com/qpdf/qpdf.git
71 lines
1.6 KiB
C++
71 lines
1.6 KiB
C++
// Copyright (c) 2005-2015 Jay Berkenbilt
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//
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// This file is part of qpdf. This software may be distributed under
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// the terms of version 2 of the Artistic License which may be found
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// in the source distribution. It is provided "as is" without express
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// or implied warranty.
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#ifndef __PL_DCT_HH__
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#define __PL_DCT_HH__
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#include <qpdf/Pipeline.hh>
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#include <qpdf/Pl_Buffer.hh>
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#include <jpeglib.h>
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class Pl_DCT: public Pipeline
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{
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public:
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// Constructor for decompressing image data
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QPDF_DLL
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Pl_DCT(char const* identifier, Pipeline* next);
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class CompressConfig
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{
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public:
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CompressConfig()
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{
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}
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virtual ~CompressConfig()
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{
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}
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virtual void apply(jpeg_compress_struct*) = 0;
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};
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// Constructor for compressing image data
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QPDF_DLL
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Pl_DCT(char const* identifier, Pipeline* next,
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JDIMENSION image_width,
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JDIMENSION image_height,
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int components,
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J_COLOR_SPACE color_space,
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CompressConfig* config_callback = 0);
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QPDF_DLL
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virtual ~Pl_DCT();
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QPDF_DLL
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virtual void write(unsigned char* data, size_t len);
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QPDF_DLL
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virtual void finish();
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private:
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void compress(void* cinfo, PointerHolder<Buffer>);
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void decompress(void* cinfo, PointerHolder<Buffer>);
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enum action_e { a_compress, a_decompress };
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action_e action;
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Pl_Buffer buf;
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// Used for compression
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JDIMENSION image_width;
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JDIMENSION image_height;
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int components;
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J_COLOR_SPACE color_space;
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CompressConfig* config_callback;
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};
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#endif // __PL_DCT_HH__
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